CZ330094A3 - Connecting press - Google Patents

Abstract

A press for sticking onto a fabric a thermobonded lining, e.g. a stiffener consisting of a textile support with layers of adhesives of hot melt or heat curable adhesives. The fabric lining complex passes through a sticking zone (A); heated to a temp. to soften the polymers, in which the complex is held between an upper (1) and lower (2) transport belts then compressed between an upper (3) and lower (4) compression cylinders. The complex between the belts passes into a second zone (B) heated equal or above the polymer softening point to cure the adhesive layer polymers. The direction of travel of belts in the second zone is opposite that in the first to reduce the machine footprint.

Description

Technical field

The invention relates to a joining press. relates to a bonding press for bonding consisting of a base fabric bonded to one or more thermoadhesive and / or heat crosslinkable adhesive polymer layers.

State of the art

Generally speaking, the meltable linings must be able to be stored even when a polymer has been applied to their base fabric and become adherent to the other fabric or fabric as a result of changes in internal parameters.

Fusible products are now commonly used in the textile industry as interlinings, for example, for use in linings or fabric manufacturing, and allow to change the properties of textiles, thereby improving their resistance and flexibility. The base fabric used can vary widely. They can be woven, knitted and nonwoven.

There are many ways to apply thermoadhesive layers to the base fabric. For reuse, spot application is preferred because it gives the fabric softness, while for other uses a continuous adhesive layer makes it easier to obtain the desired properties.

In the case of the midsole, the base fabric is coated with a meltable material. Nowadays, this coating is most often formed by a dot-like coating. he110 = radio technique (powder dot using engraved cylinder) or silk screen technique (paste dot using rotary screen). First, the melt polymers in the form of a powder or paste are heated to a temperature where they melt and thereby adhere to the base fabric.

The meltable lining thus obtained is then brought to room temperature. It is therefore essential for different products that they do not stick together if the meltable lining does not have any adhesive and adhesive properties in the room.

stored at a layer of this contact, no temperature

The meltable lining is used by manufacturers who place it on other fabrics, fabrics or linings and then bond between the lining and the fabric using a press that exports a pressure ranging from a few decibars to several bars for a relatively short time of about 10 to 30 seconds at temperature usually above 100 ° C. During this operation, the meltable polymers of the melt must regain their adhesive properties. However, during this operation, their viscosity must not be too low for too long a period of time, since otherwise the polymer will pass through the base fabric or fabric and give it the opposite properties which make the product unattractive and mostly unusable.

Finally, ready-to-wear garments and interlining fabrics or interlinings as such must, in particular, be able to withstand various forms of treatment such as washing, ironing, etc. The binding made by prior processing must also withstand difficult cleaning operations.

Many attempts have been made to achieve products perfectly adapted to the various influences arising from the above treatments.

It has therefore been proposed, for example, that the meltable interliner be manufactured by consisting of a base textile attached to one or more terraoadhesive and / or warp, crosslinkable adhesive layers. This type of lining is intended for sale to the manufacturer, who associates it with the fabric or lining using a joining press.

However, notwithstanding the fact that conventional presses used to heat weld pieces of textiles have the advantage of keeping the two textile parts (lining and fabric) in constant and continuous contact long enough to achieve their bonding, another operation such as a crosslinking reaction of the adhesive layer.

consequence from above

However, this type of heat welding press necessarily has a limited construction and the time for which the meltable lining and the fabric must remain heated and this prevents the joining operation and the operation from successfully and permanently performing both cross-linking, which results.

that joined set of midsole / fabric. it does not exhibit the required properties in particular it has no transversal payback and resistance to high temperature washing, ironing, etc.

Therefore, it is necessary to use a press having successive surfaces which do not require at least two different but floor surfaces as compared to the prior art presses.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a connecting press which, on the one hand, makes it possible to overcome the aforementioned limitations and disadvantages and which, on the other hand, has the same floor space requirements as the prior art presses. is to allow other operations to be carried out in addition to thermal slope.

It is a further object of the invention to provide a reliable, economical and fast, low maintenance joining press.

In particular, it is an object of the present invention to provide a bonding press for bonding a fabric to a meltable lining consisting of a base fabric bonded to an adhesive layer comprising both at least one bonding system and at least one cross-linkable system.

SUMMARY OF THE INVENTION

The essence of a bonding press for bonding a fabric to a meltable lining consisting of a base fabric bonded to at least one thermoadhesive and / or thermally crosslinkable adhesive polymer layer comprising a bonding region heated to the melting point of the polymer, wherein the bonded interlining-fabric assembly is sandwiched between the upper and lower conveyor belts and then compressed between the upper and lower pressure rollers of the invention, wherein the interlining-fabric assembly is sandwiched between two conveyor belts passing through a second region heated to a temperature greater than or equal to the melting point of the polymer (s) to effect a chemical coupling reaction thermally. cross-crosslinkable polymers in the interlining adhesive layer.

In the first area only heat welding is carried out and the second area in which other operations can be carried out (eg cross-linking of the adhesive layer after heat welding has been completely completed in the first area) must be separate so that the temperatures and pressures used can be used. both areas different.

According to a preferred embodiment of the invention, the interlining-fabric assembly sandwiched between the two conveyor belts passes through a third region heated to a temperature greater than or equal to the melting point of the polymer (s).

Overview of the drawings

An exemplary embodiment of a press according to the invention is shown in the accompanying drawing, in which a side view of the press is schematically shown.

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION The invention relates to a bonding press for bonding a fabric to a meltable lining consisting of a base fabric attached to at least one thermoadhesive and / or heat crosslinkable polymer layer.

The bonding press according to the present invention is intended to perform a heat-sealing and cross-linking operation to ensure the interlining with the fabric to be bonded in a successful and continuous manner.

For this purpose, the lining and the fabric placed on top of each other are continuously conveyed by the lower conveyor belt 2, preferably the fabric rests directly on the lower conveyor belt 2. ·

The bonding press comprises the bonding region A in a known manner heated to the melting temperature of a thermoadhesive and / or heat cross-linkable polymer. In this connection region A, the lining / fabric is clamped between the upper conveyor belt X and the lower conveyor belt 2 and then compressed between the upper and lower pressure rollers 3 and 4.

In other words, in this joining area A, the lining / fabric assembly is sandwiched between two conveyor belts X and 2 and passes through an area heated to, for example, SO to 130 ° C for about a few seconds. As this temperature rises, the polymers) become adhesive. it melts or dissolves under the effect of heat and mechanically adheres to the fibers of both textile parts (interlinings and fabrics), moistening them without soaking in them.

At the end of this region, both conveyor belts X and X holding the lining / fabric heated assembly pass between two pressure rollers 3 and exert a pressure of several bars and for a relatively short period of a few fractions of a second to achieve bonding and bonding of the lining with fabric.

According to the invention, the lining / fabric assembly sandwiched between two conveyor belts X and 2 passes through a second region heated to a temperature greater than or equal to the melting point of the polymer (s) so as to allow chemical coupling of cross-crosslinkable polymers in the adhesive layer of the lining.

For this purpose, in the second region E, the lower roller 4 is no longer a pressure roller, but a return roller for the interlining / fabric assembly sandwiched between the conveyor belts χ and 2; .

In other words, the interlining / fabric assembly sandwiched between the two conveyor belts X and 2 by changing the circumferential surface of the return roll exerts no pressure on the assembly by an angle of 180 °.

In this second region B there is a lining / fabric. Only the mechanical adherence of the polymers to the fibers of the two textile components (interlining / fabric) obtained in region A is maintained separately by gripping the interlining / fabric assembly between the two belts.

The second region B is heated by heating means located substantially near the side between the lining.

By positioning substantially near the side of the midsole, it is understood that the heating means is in contact with the upper side of the conveyor belt X on which the midsole is placed against the substance that is pressed against the lower conveyor belt 2.

According to another feature of the invention, the interlining / fabric assembly sandwiched between the two conveyor belts X and 2 passes through a third region C heated to a temperature greater than or equal to the melting point of the cross-crosslinkable polymer (s). j

The guiding direction through the third region C is changed relative to the direction in the second region by the return roller 15.

As mentioned above for the second region B., no pressure is exerted on the interlining / fabric assembly in this third region C. Only the mechanical adherence of the polymers to the fibers of the two textile components (interlining / fabric) obtained in region A is maintained separately by gripping the interlining / fabric assembly between the two.

cylinders.

Also, as mentioned above for the second region B, the third region C is heated by heating means located substantially near the side of the midsole.

From the above description, it is apparent that upon exiting the pressure rollers 3 and 4, both conveyor belts 1 and 2 keep the lining / fabric assembly in close contact so as to prevent any possible displacement of the two textile parts and pass through two regions B and C for cross-linking heated to a temperature higher than or equal to the heat-sealing temperature of e.g. 15G ° C. for a period of between 10 and 50 seconds required to effect the chemical coupling reaction of the cross-linking system to provide a three-dimensional cross-linking structure resistant to heat and solvents (water, chemical reagents).

Preferably, the second and third regions B and C are curved to allow close contact between the fabric and the lining.

Furthermore, the connecting press according to the invention consists of means for driving the conveyor belts X and 2 and means 7 for guiding the conveyor belts X and 2 arranged to provide a common path of the upper conveyor belt X and the lower conveyor belt 2 in the connecting area A and second and third regions B and C; and different paths of the upper conveyor belt X and the lower conveyor belt 2 outside these regions.

Further, the joining press according to the invention is provided at the outlet of the second region B or the third region C with means for cooling the lining / fabric assembly (e.g. by air circulation) to completely solidify the polymers.

Although only some embodiments of the invention have been described herein, it will be understood that any modifications made within the same inventive idea remain within the scope of the present invention.

Claims (9)

PATENTOVÉ Claims S 6 i O O? CQ A bonding press for joining a meltable lining consisting of a base fabric attached to at least one thermoadhesive and / or thermally crosslinkable layer of the type consisting of a bonding region (A) heated to the melting point of the polymers) in which the interlining assembly is / fabric sandwiched between the upper conveyor belt (1) and the lower conveyor belt (2) and then compressed between the head pressure roller (3) and the lower pressure roller (4) the midsole / fabric pinch assembly (1,2) passes through the second region (B) a temperature greater than or equal to the melting point of the polymer (θ) allowed a chemical coupling reaction of the cross-crosslinkable polymers in the interlining adhesive layer, the bottom roller (4) being the return roller for the interlining / fabric assembly sandwiched between the two conveyor rolls (1,2) is to reverse the line direction in the second region (B) with respect to the line direction in the connecting o area (A). characterized in that between two conveyor belts heated to such that The connecting press according to claim 1, characterized by the second region (B) being heated by the heating means substantially close to the side of the midsole. by being placed 3. A press as claimed in claim 1, wherein the second region (B) is curved. A splicing press according to claim 1 to 3, characterized in that the lining / fabric assembly sandwiched between two conveyor belts (1,2) passes through a third region (C) heated to a temperature higher than or equal to the melting point of the polymer (s). Coupling press according to Claim 4, characterized in that the guide direction in the third region (C) is changed with respect to the guide direction in the second region (B) by means of a return roller (5). 6. A press as claimed in claim 4 or 6, characterized in that the third region (C) is heated by heating means located substantially close to the side of the lining. 7. The press according to claim 4, wherein the third region (C) is curved. Connection machine according to claim 1 to 7, characterized in that it consists of means (6) for driving the conveyor belts (1,2) and means (7) for guiding the conveyor belts (1,2) so arranged as to be a common path of the upper belt (1) and the lower belt (2) is provided by the connecting region (A) and the second and third regions (B, C) and a different path of the upper belt (1) and the lower belt (2) outside these regions. A press as claimed in any one of claims 1 to 8, characterized in that at the outlet of the second region (B) or the third region (C) it consists of means (8) for cooling the lining / fabric assembly.